Mining machine



April 3, 1935. A P A T 1,996,255

MINING MACHINE Filed Jan. 3, 1953 6 Sheets-Sheet 1 -7 g4 I 09/ 0/711 (ll L C. A. PRATT MINING MACHINE April 2, 1935.

6 Sheets-Sheet Filed Jan. 3, 1933 C. A. PRATT MININGMACHINE April 2, 1935.

6 Sheets-Sheet Filed Jan. 3, 1933 (in .M M

April 2, 1935. I g, A, PRATT 1,996,255v

MINING MACHINE Filed Jan. 3, 1933 6 sheets-Sheet, 4

April 2, 1935. Q A PRATT 1,996,255

MINING MACHINE I Filed Jan. 3, 1933 6 Sheets-Sheet 5 A ril 2, 1935. c. A. PRATT 1,996,255

MINING MACHINE Fi led Jan. s, 1955 6 sheets-sheet s 1 K/Earles Pmfi" 7. -14 HZ Mflirrngy I I I Patented Apr. 2,,1935 V UNITED STATESAYPATENT OFFICE man Manufacturing Company, Chicago, 111., a corporation of Illinois Application January 3, .1933, Serial No. 649,805 20 Claims. (crate-2's) This invention relates to improvements in embodiment of my invention illustrated in Figmining machines of the track mounted' type ure 1,- I capable of cutting horizontal kerfs in the mine Like reference characters refer to like parts wall adjacent the mine bottom in front of and t oughout the Vari s fi 5 to, each side of the track, or at various eleva- Referring now in particular to the embodi- '5 tions and planes with respect thereto including ment of my invention illustrated in the accomakerf adjacent the mine roof while the map nyin wings, a truck It is p v which chine is held in a stationary position on the track comprises a truck frame H mounted on track together with shearing kerfs ateither side of the Wheels I 2 and axles IS. A p v t movable longitudinal center line of the machine, and has frame I 4 is support n the truck frame for 10 as its general objects to provide a new and impivotal movement with respect thereto about a proved machine of the class described conboss I5 extending upwardly from the rearward structed with a view towards general all around end of said truck frame and. disposed on the lonefliciency, ruggedness, compactness, and ease and gitudinal center linethereof,

simplicity of operation. Cutting mechanism, generally indicated by 15 A track mounted mining machine of a typ reference character It, is supported on the pivotsimilar to that disclosed in my present invenally movable frame 14 in-a manner which will tion is disclosed in a prior' application filed Nohereinafter be more fully described. Said cutvember 23, 1931, Serial no. 576,635, which issued ing mechanism includes a motor dispo as Patent No. 1,979,058, on October 30, 1934, so jac'ent the rearward end thereof, a housing I8 20 the present disclosure will be' directed more pardispos d wardly of said motor and p v d ticularly to the improved features calculated to a earing pport and housing for a p r i n of improve the efficiency of the machine and perthe gearing for driving a cutter chain 2| about mit the cutting of shearing kerfs and kerfs ada cutter bar 28 and feeding said cutter bar in J'acent the mine roof, as well as along the mine t e coal in the ma ner ful y described in bottom. aforementioned prior application. The housing Other objects of my invention will appear from If! also has bearing S pp means formed time to time as the following specification proi gral the w t fo pp a forwardly ceeds. tending cutter frame l9, whereby said cutter 30 My invention may be more clearly understood frame y be adjusted about an aXiSioXtehding '30 with reference to the accompanying drawings longitudinally .Said housing and e in v r wherein: ous positions ofadjustment with respect thereto Figure 1 is a t plan View ofone embodiment during the cutting operation. The cutter frame of my invention; 19 extends forwardly of the pivotally movable Figure 2 is an enlarged partial fragmentary frame It and truck 10 and provides a support 35 side elevation of the forward portion of t for the cutter bar 28. The cutter bar'20 has the vice shown in Figure 1 with parts broken away u er Chain movable'thereabout' in a closed and taken in longitudinal t orbital path in the usual manner and said cutter 4 Figure 3 is an enlarged partial fragmentary is supported by the t i Q side elevation of the rearward portion of the em- Justment with respect mummy of bodiment of my invention illustrated in Figure 1, r e Manes and for iv movement aflbout with parts broken away and taken in longituan axis d perpendlcularly to the axls of dinal section; pivotal movement of said cutltiesr game. m v d I A pair of runnion suppo are 'spose y 4 Is an enlarged partial fragmentafy adjacent the forward endof the pivotally movplan view of the forwardportion of the embodiable frame M on each Side of the cutting mech separatists m c clefl Show details thereof for pivotal movement about an arms extending y transversely thereof and for adjusting the angle o0 igure 5 15 a sect onal view taken substantially of the cutter bar-2n with respect to the mine talong lme of Flgure 2; tom to enable said cutter bar to out where the bot Figure 6 is a sectional view taken substantially t 1- Coal seam is uneven. I along l e 5- f F e a d The cutting mechanism 16 is yieldably sup- Figures '7, 8, and 9 are partial diagrammatic ported and moved about its axis of pivotal conviews showing various operating positions of the nection to the trunnion supports 23, 23'ina usual device, generally indicated by reference character 30, which is of a usual construction so will not herein be described in detail. The planetarygear reduction device is controlled. by. a. suitable friction band 3| in the usuaL-manner. and .isprovided with low speed clutch jaws 32 adapted to be meshed with clutch jaws 33 formed integral with a clutch sleeve 34 for driving a longitudinally extending shaft 35 at a low frictionally controlled speed. Likewise, clutch jaws 38 are formed integral with, the inner endzof the sleeve :28 land are adapted to be meshed with the clutch jawst133 :for driving the longitudinally extending-shaft 35 at a higher speed. .Said longitudinallyex- .tending shaft is connected with a transversely extending, shaft: 31" disposed beneath thetruck frame ll by'means10f a-suitablewormandworm V. gear drive 38,-,splined,shaft 39. slidably engaged 1 with-thewormgearof said worm and worm gear drive, a bevel gear; driven by the lower ,end ;,of ;,said splined shaft and bevel gears 4| driven gthereby and selectively; connectible with the transversely extending shaft -3l-by;-means of suitable clutch mechanismin the usual; manner 1(not -.-s ho w n) so 'that saidshaft may-be driven in one .direction when connected with onecofthe, bevel gears ll and-in an opposite direction. when con- ..nected-withsaid ,opposite-bevel gear.

1 The transversely extending shaft 31 -is connected to the rearward truck axles 1 vI 3--for; drivingsaid truck; axles by 'means of 'a suitable chain. and

sprocket drive, generally indicated by reference character 42, and the forwardandrearward'truck ;a xles are connectedtogetherby means of a :suitrablechain and sprocket drive,generally indicated -by reference character. .may move about the mine on its own power at Thus the truck e10 ,eithera high sped or a low frictionallycontrolled speed in either-a forward or reverse direction -without reversal of themotor- I1. -'I'hisprovides .a meansforspeedily-moving the mining machine ,about the mine and positioning said machine-for cutting with ample power for propelling the-min- .ing machine at, a relatively slow feeding speed for feeding thecutter bar 20-into :the coal, particularly when cutting shearing. kerfsinthe mine wall and for propelling themining machine where .the track is rough ,or the grades are relatively s e p.

. Anarcuate rack 44 extends upwardly from the forward end of the truckframe H. and its teeth facetowards the rearward end of the; mining machine. Said rack is formed on a radius-whose center: is coaxial with the axis of .pivotal connection of the pivotally movableframe M to the truck-frame, ll. said rack, is meshed with a pinion-4.5, carried onthe. lower endof a vertical shaft (It, and journaled on.itshub. in the lower, portion ofthe housing l8. The;pinion.45 is driven from the;motorr I? at either ,a;high or low frictionally ontrolled sp eed,in,reverse directions without reversal of said motor forpivotally moving the pivta1ly ,movable frame 14- by :means ,of a suitable systemvof gears which .willhereinafter be more fully, described.

The forward end of the pivotally movable frame I4 is supported on suitable rollers 41 which ride in an arcuate shaped channeled guideway 49, which guideway in turn is slidably supported in the truck frame ll for supporting said pivotally movable frame when its forward end is beyond the boundaries of said truck frame in a manner which has been fully described in my aforementioned prior application. The rearward portion of the pivotally movable frame I4 is supported on suitable rollers which ride in an arcuate shaped channeled guideway 5| disposed rearwardly of the rearward truck axles but forwardly of,.the. boss I 5.

A counterwei ht 52 is provided on the rearward end of thepivctally movable frame Hi to counteract the weight of the cutter frame 19 and cutter --bar 29. Said counterweight is disposed rearwardlyof the truck frame H and depends from the rearward portion of the pivotally movable iReferring nowv in particular to several .of the novel features ofmy invention and the means for supporting the cutter frame I 9 by the housing '18 for pivotal movement about an .axis extending longitudinally of the cutting,mechanismalii said cutter. frame is provided with a'rearwardly extending neck 53 which is carried in the housing M3 for rotation with respect thereto by a suitable bearing support, the lower half .of which is formed integral with said housing. A bearingmember v.5 1 is spaced forwardly of the neck 53 and is integral with the cutter frame l9. Said bearing member is of a largerdiameter than the neck 53, but its longitudinal center iscoaxial with the 1 axis of rotation of saidneck. Said bearingmem- .ber is journaled in a suitable bearing support, the lower half of which is integral with the hour- ;ing l8 and extends forwardly of the truck frame H.v A cap piece 55 forms the upper half of the .bearing support for the neck 53 and bearingmember. 54 and extends upwardly from the housing It) and is detachably secured thereto by suitable capscrews in an ordinary manner. A split annular retaining ring 57 is secured to the forward end of the cap piece 55 and bearing formed integral withthe housing H? by means of suitable cap screws and a portion of its inner surface abuts a shouldered portion 53 on the forward side of the bearing member 54.

Suitable means are provided for rotating the cutter frame [9 with respect to the cutting mechanism 96 which include a spur gear 53 freely mounted on the neck 53 forwardly of its portion which is journaled in the housing 18. A suitable clutch member 68 is feathered on the neck 53 and is provided with rearwardly facing clutch jaws 8| which are adapted to mesh with forwardly facing clutch jaws 63 formed integral with the forward side of a spur gear 64 disposed forwardly of and formed integral with the spur gear 59.

The spur gear 64 serves as a drive member for pivotally moving the cutter bar 20 and adjusting said cutter bar with respect to the cutter frame IS, in a manner which will hereinafter be more fully described. A suitable reversible frictionally controlled plural speed drive connection is provided from the motor l! to the spur gear 59 for driving said spur gear at either a high or low frictionally controlled speed in reverse directions without reversal of said motor, which drive connection will be'more fully described as this specification proceeds. Thus, when the spur-gear 59 is connected with the motor ll so as to be driven therefrom and the clutch jaws 6! are meshed with andijournaled therein. Said shaft "has a? pinion h the clutch jaws 63, thecutter frame I9 is'pivotobvious manner. l Suitablemeans are providedfor locking the cutter frame I9in various'fixed positions'with' ally movedwith respect to the housing I8 in an respect tothe housing I8, which means maybe of any construction but is herein preferably shownas being a pin and aperture lockicomprising a threaded pin 65 carried in a projecting lug 66 integral with the cutter frame l9. Said threaded pin is carried in said lug for free translational movement with respect thereto butheld from ro-' tational movement in a suitable manner'inot shown) and is adapted to register with any. one

of a plurality of spaced apertures'B'I formed in the split annular ring'5I and forward face of the cap piece 55 and forward end of the portion of the housing I8 forming a bearing support for the hearing member 54. A suitable, hand wheel 68 is threaded on the pin 65 andabuts the forward side of the projecting lug-66 and is provided with a grooved hub 69, the grooved 'portion of which is engaged by a holding member 1950 rotation of said hand wheel will engage the pin 65 with or disengage said pin fromthe desired aperture 61. I

With referencenow in particular to the means c for supporting the cutter bar 20 "for movement spaced guides 14 extendingupwardly from towards/and away from the cutter frame I9; a

pair of parallel spaced guides I3 disposed forwardly of the bearing member 54 extend outwardly from opposite sides ,of' saidcutterframe in a plane perpendicular to a plane intersecting nioned therein which carriesa threaded shaft I6; Said threaded shaft extends upwardly from the memberg'fl and is threaded within a hub!!! of a worm gear;80.journalled inithe cutter frame IS-adja'cent the. forwardendthereof in a suit- -able manner."Said threaded shaft is held from translationalmovement'with respect to the memher. by means of a pinion-"keyed on its outer end and" abutting the outer sideJOf the member 11,. and afjsuitable shouldered portion abutting theopposite end of said member, The annular support :j'member I! 5, forms an annular bearing member for a cutter bar support membertl to ,which the cutter bar 20 is secured in a usual manner, The cutter bar support member 8I is,

held from translational movement with respect tosaid annular support memberlby means of an 'annularjring 82 securedtosaid cutter bar support member :in a suitable manner; andabutting -a shouldered portions form'edyin saidjannular supportmember. An internal (rack 83is-secured to theupper side of thecutter bar support member 81 adjacent the forwardendthereof. Said rack is adapted) to be meshed with the pinion I8 so that rotation of said pinionywill pivotally move the cutter'bar support member 8| and cutterbar Zflabout an axis perpendicular to'theaxis'of ro-, tation of the cutter frame I9. I 7v v Suitable means are provided for rotating the worm gear 89 and translationally moving the threaded shaft I6 with respect to the cutter frame I9 orfor rotating said shaft and "pivoting the cutter bar 20 about an axis disposed perpendicularly to the axis of rotation of said cutter frame. Said means, as herein shown, comprise'a shaft 84 extending longitudinally'of the cutter frazne1l9 Theparallel spaced guides 73 are '85 keyedon its. rearward end, which pinion is meshed with and driven from the spur gear I54- formed integral with the spur gear 59. The'axis of'rot'ation of the longitudinally extending shaft 94 is so arranged with respect to theaxis of rotation ofthe cutter frame I9 that the pinion 85 may ride around the spur gear 64 as the cutter frame I9 is in various positions ofadjustment with respect to the housing I8 so thatfsaidshaft may be driven from said spurgear in all positions of adjustment'o'f said cutter framewith re'- spect to said housing. A worm 8'I-is freely. mount"- ed on the-shaft 84 adjacent its forwardend and j is journaled in and encased in a suitable worm and worm gear housing formedjintegral with the forward portion of the cutter'frame I9. Suitable' ,clutchjaws'88 are formed integral with and ex tend rearwardly from the hub of the wormTBI and are adapted to be engag'edby suitable'clutch jaws 89formed,integral with and extending for-L wardly of aclutch member 90 feathered on the shaft 84; Theclutch member "90 is shiftedby means of a suitable system of links ancllevers in a usual manner (not shown) for selectively driv;

. ing the worm 81 from'the'shaft' 84; It is'thus apparent that when the worm gear 80 -,is driven will move translationally with respect to the'cutter frame I9 for adjusting the "position of the cutter bar 20 with respect to said cutter frame? Suitable clutch jaws 9I are formed integral I with and extend upwardly'from the upper side of the wormgear189 and are adapted to be engaged by suitable clutch jaws 92 depending from aclutch member 93 feathered on 'thethreaded shaft in a suitable mannerso that when the clutch'jaws 92' engage. the clutch jaws 9 I, said threaded shaft will be rot'atedby the wormgear 8 0"which intur-n', will drive the pinion I8 and pivot the cutterbar 20 about an axis disposed perpendicularly of the axis of rotation of the cutter-frame I9. Thewo'rm 8'1 and worm gear 89 are of the self-locking type;

I that is, the pitch of said worm and worm gear is such that said worm gear cannot drive; said worm; Thus thethreaded shaft I6 is held from rotationwhen the worm Mis -disconnected from the shaft"84 and-the cutter bar 20 is locked in, i

various angular positions with respect to the cut terframe I9;

Referring now driving thefcutter chain 2! about the cutter bar 20' and the drive mechanism for pivotingthe pivotallymovable frame I 4 and effecting rota- .tional movement "of the cutter frame, I9 about i an axis disposed longitudinally-ofxthe' cutting in particular to 'themeans'for I mechanism lfi, pivotafm'ovement of the cutter bar 20about an axis'disposed perpendicularly to justment' of i said cutter bar towards or away from said cutter frame, an armature pinion 94 i ,v provided on the'forwardfend of "the armature shaft 26. Said armature pinion meshes with iathe axis of rotation of said cutter frame and ad-, r

spur gear95 keyed on the rearward end of a longitudinally extending shaft 96 journaled in the housing ,l 8andyneck 53 of thecutter frame I9 forrotation about an'axis coaxial'with the axisof rotation" of said cutter, frame; A bevel pinion -9Iis1keyed on the forward' end" of the longitudinally extending Q shaft 96 and meshes with and drives abevel gear 98 journaledlonits hubwithin the cutter frame I9 in the usual manner. A cutter chain drive sprocket 99 isadapted Y I I to mesh with and drive the cutterchain 'ZIjandf is keyed adjacent the lower end of asleeve mem beretflll'wjournaled in the support member 8i for rotationabout anaxisxcoaxial with the axis of pivotal movement ofthe cutter bar 20. The bevel 803N198 and sprocket 99are operatively connected together so said sprocket may be driven bysaid bevel gear in allpositions of adjustment of thecutter bar 20 with respect to' said bevel gearbymeans of a suitable splined shaft 'IDI inausual manner. p I I r j 1A, pinion I03 is keyed on the longitudinally extending shaft 96 forwardly of the rearward bearing support for said shaft and meshes with and drives a spur gear IQ i ,keyed adjacent-the rearwardend of a longitudinally extending shaft. I85 disposed beneath the longitudinally extending shaft196. The longitudinally extendingshaft IE5 is journaled in suitable bearing supports extending upwardly' from the housing i8 and has .a

spur gear I57 keyed thereto adjacent-its rearward portion butforwardly of the pinion IE3. The spur gear lB'I. meshes with'and drives spur gears lflfl anjd I09 disposed oniopposite sides thereof: A spur gear I I6 is keyed on the forward end of the-longitudinally extending shaft I95 and mesheswith and drives idler pinions I I I and H2, which idler pinions in turn mesh with and drive spur gears H3 and II 4, respectively, disposed on oppositesides ofthe longitudinally extending shaft IBS and coaxial with the axis of rotation of the, spur gears I8? and I518. The

spur gear I08 is thus driven from the longitudinally, extending shaft I 95 in a direction opposite to which the spurgear I I3 isdriven from said shaft and the spur gear IE9 is driven from said shaft ;in a n opposite direction to which the spur gear H4 is driven from said shaft. 7

-;The spur gears I98 and H3 arekeyed on the hubs of suitable friction clutch members H5 and I I6, respectively, which ,clutclrmembers are in. turn freelymounted on a sleeve II'I. Said sleeve isfreely mounted on a longitudinally extendingshaft I I8-journaled in suitable bearing supports extending upwardly from the bottom portion of the housing I8. A suitable clutch member H9; rhaving'oppositely disposed friction engaging faces I20, I26, is feathered on the sleeve II'Iso that when one face I engages the friction engaging face of the clutch member H5, the sleeve I I] will be driven in one direction and when the opposite face I29 engages the. friction engaging surface of the clutch member H6, the sleeve II'I will'be driven in; an opposite direction. The'clutch membersH5, H6 and H9 may be of any construction well known to those skilled in the art but are herein preferably shown as ibeing'of a friction cone type.

1A sun gear IZI is formed integral with the forward endofthe sleeve II? and forms a driving gear for a planetary gear reduction device I22 controlled by a suitable friction band I23 in a usual manner. Said planetarygear reduction device isprovidedwith high speed clutch jaws I24 and low speed clutch jaws 525 which are adapted to be'engaged by clutch jaws iZB on a sliding clutch member I21 feathered on the longitudinally extending shaft H8 for driving said shaft at either :a: high or -low frictionallycontrolled speed, A spur pinion I 29 is keyed on the forward end of the longitudinally extending shaft I I 8 and meshes with and. drives the spur gear '59 journaled on the neck 53. I a Itis thus apparent that, the spur gear 59 may be driven from the motor I? at eithera high or low'frictionallycontrolled speed in reverse directions withoutreversal of said motor. Thus, when the spur gear 59-is driven from the-motor I11 and the clutch jaws'fil are engaged'with the clutch jaws 63, the cutter frame I9 may be rotated about an axis extending longitudinally of the cutting mechanism 16 at either-a high or low frictionally controlled speed and the direction of rotation of said cutter frame may be reversed without reversal of the motor. Thus, an improved positioning means, has been provided for rotatably adjusting thecutterframe I9 and cutter bar 20 for cuttingeither adjacent the mine bottom or mine roof or at various angles with respect tothe mine bottom and mine roof. It is further apparent that when the clutch jaws FBI are disconnected from the clutch jaws 63, the spur gear 59, while acting as a means for rotatably adjusting the cutter. frame i9, also acts as a common drive member for pivoting the cutter bar 20 about an axis disposed perpendicularly to the axis of rotationof. the cutter frame I9 at either a high or low frictionally controlled speed'without reversal of the motor !'l or for moving said cutter 'bar 'towardsor away from said'cutter frame.

The pinion 45, meshing with the arcuate rack 44, is driven from the motor ii at either a high or low frictionally controlled speed without reversal of said motor for pivotally moving the pivotally movable frame :I i across the truck frame H in opposite directions by means of either of the spur gears I03 or i i 4 through a friction clutch member adapted to engage eithera friction clutch member It! on which the spur gear 189 is secured or a friction clutch member I32 on which the spur gear He is secured for driving a frictionally controlled planetary gear reduction device I 33 in opposite directions without reversal of the motor I! in an obvious manner. A longitudinally extending shaft I35 is driven from the frictionally controlled planetary gear reduction devicei33 at either a high or low frictionally controlled speed in the same manner that the longitudinally extending shaft H8 is driven from the planetary gearfreduction'device I22. A bevel pinion I38 is keyed on the forward end of the longitudinally extending shaft I35 and meshes with and drives a bevel gear I3! on'the upper end of a vertical shaft I38. A spur gear I39 is secured to the vertical shaft I38 beneath the bevel gear I31 and meshes with and drives a spur gear I45] keyed-on the vertical shaft M5 on the opposite side of the housing I8 from the pinion 45;

1 With reference now to Figures 7, 8 and 9 diagrammatically showing several cutting positions of the devices embodying my invention, the machine is adapted to be held in a stationary position during the cutting'operation by means of suitable jack sockets MI detachably connected to the outer ends of the rearward truck axles I3 and adapted to engage the mine rail and mine bottom which have suitable jacks I42, I42 interposed therebetween and the mine roof or mine wall. Figures? and 9 show the cutter bar 28 positioned for shearing to either side of the longitudinal axis of the cutting mechanism I6. In shearing, the cutter bar 20 is usually positioned'so its forward end is adjacent the mine roof. The cutter chain 2| is then put in operation and theentire machine is moved forwardly along the track at a relatively slow feeding speed controlled by the frictionally controlled planetary gear reduction device 30 until the cutter bar 29 has been moved into the coal to the desired depth. The machine may then be held in a stationary position on the track by means of the axis disposed'perpendicularly to the axisrof pive I c a support, a pivotally movable frame supported 1 on saidsupport for movement about a vertica'lf axis disposed adjacent the rearward end thereof otal movement of the cutter frame l9 until the forward'end of said cutter bar is adjacentthei mine bottom; When in such a position, the jacks I42, I42 and jack sockets IL-11H" are removed and the machine is moved rearw'ardly along thetrack withdrawing the cutter bariotherefrom.

in detail.

In Figure 7, the cutter bar2iiis shown by dotted lines as positioned. for cutting adjacentthemine bottom while in Figure 8 said cutter bar is shown by solid lines as cutting adjacent the mine roof. Cuts adjacent the 'min'e'roof or'mine bottom may be made in a manner which;has been fully disclosed in my aforementioned prior application and,

which will accordingly, not-herein be described- While Ihave herein shown anddescribed one form in which my invention may .be embodied,' I

donot wish to limit" myself to the precise con-. struction and arrangement of parts shown,- it being understood that alterations or changes may be made without departing, fromthe spirit and scope thereof. Furthermore, I do not wish to be construed as limiting myself to the particular embodiment illustrated, excepting as itmaybe limitedin the appended claims.v

, I claim as my invention:

1. In a mining machine of the class described,

a support, a pivotally movable frame supported on said support for movement about avertical axis disposed adjacent the rearward end thereof, a

, motor on saidpivotally movable frame and means driven by said motor for pivotally moving said pivotally movable frame, including a rack on the forward end of said support, havinga pinion meshing therewith, cutting mechanism supported,

on said pivotally movable frame includingia cutter frame extending beyond the forward boundaries of said support'andcarried for ro-' tation about an axis extending longitudinally of said cutting mechanism and ancutter bar pivotally movable about an axis disposed perpendicularly to the axis of rotation of said cutter frame and means driven by said motor for 'I'O-r tating saidcutter frame or. pivotally. moving s'aid cutter bar when said cutter frame is in various positions of adjustment with-respect to said supportincluding a pair. of coaxial gears rotatable about'an axis coaxialwith the axis ,of pivotal movement of said cutter frame. v

2. In a mining machine of the class described, a support, a pivotally movable frame supported on said support for movement about'a vertical axis disposed adjacent the rearward end thereof, cutting mechanism'supported on said'pivotally 5 movable frame includinga cutter frame extend- 'ingbeyond the forward boundaries of said support and carried for rotationabout an axisextending longitudinally. of said cutting mechanism and a cutter bar pivotally movable aboutan axis disposed perpendicularly to the axis of rotation of said cutter frame, locking means for positively holding said cutter frame in various positions ofadjustment with respect to saidsup -port'and drive gearing coaxial withthe axis of swinging, said cutter bar in a; planej-parallel' the axis of pivotalmovement of 'said'cutter .fra 1 3.v In a'mining machine of the class described,

cutting mechanism supportedo g said pivotally movable .frameincluding a cutteriframe extende;

tending longitudinally of said cutting mechanism i of ,saidcutter frame, ajpin and-aperture locking f device for holding saidcutter frame in various positions of adjustment with resp ect' to said support and drive gearing coaxialwith thei-axisof rotation of said cutter frame for selectively rc-,,

tatinggsaid cutter frame or pivoting said cutterbar about its axis ofapivotal connection to'said cutter frame'including a gear having selective connection with said cuttergheadand another gear coaxial therewithand driven thereby having selective connection with'said cutter bar for swinging 'saidcutter bar in a plane parallelto the axis: of pivotal movementof said cutter frame. I x v :M 4. Inafmining machineof the class described,

frame rotatable about a horizontalaxiaa cutter bar supported therebyfor pivotal movement about an axis disposed perpendicularly to the axis of pivotal movement of said cutter frame, andcom- 'mon drive means for selectively rotating said cut-. I I

ter frame or pivoting said cutterbar about its axis ofpivotal connection to'said'cutter frame comprising ,a drive gear-coaxial with the aims ,of'rotation" of ,said cutter frame, a selective connection from said gear to said-cutter-head for rotating said cutter head therewith and another coaxial gear driven by said first mentioned gear andham ing'driving connection with said cutter bar.

, 5.-.-Ina mining machine of theclassclescribed,

cutting mechanism therefor including a cutter framerotatable about a horizontal axis, a cutter bar supported thereby for pivotal movementabout gear driven by said first mentioned gear and-having driving connection. with said cutterlbar, and

an axisdisposed perpendicularly to theaxisof looking means-for positivelyholding said; cutter I frame, in various positions of adjustmentwith re- 1 spect to said support comprising a pinand aper:

.ture lock. 1.,

6. In amining machine, ofthefclassdescribed, cutting ,mechanism therefor including a cutter 'frame rotatable about a horizontal axis, acutter bar supported thereby for pivotal movement about an axis disposed perpendicularly to the axis of pivotal movement of said; cutter frame, and commontdrive means for selectively rotating said cutter frame or pivoting said cutter bar about its .axialgear driven by said first mentioned gear and having driving connection with' said cutter bar,

locking means fonpositively holding said cutter frame-in various positions of adjustment with respect to said support and other locking means for holding said cutter bar in various .positions of adjustment with respect {to said-'cutter framei "I? a mining 'machin'e of the class described,

' cuttiiig mechani'snr thei'efor inclu'dinga' motor, a

cIi'ttrframe disposed 1 forwardly of said lmotor fdrrot'ation about a horizontal axis, a-cutter bar sappeaea-i thereb'y f of pivotal 5 movement about as asdisp' ose'd piefrpendicularlyto the axis of til-movement of saidacutter frame, and comcutting mechanism therefor including a motor, a

cutter ban;

cutter frame disposed forwardly of said motor for rotation abouta horizontal axis, a cutter bar supported thereby for pivotal movement about an axis disposed perpendicularly to the axis of pivotal movement of said cutter frame, andcommondrive means for selectively rotating said cutter frame or pivoting said cutter bar about itsaxis ofpivotalconnection to sa'idcutter' frame comprising a shaft extending longitudinally of said cutting -mechanisr n driven by said motor and-rotatableabout an'axis eccentric of the axis of rotation of *saidbutterframe, a gear'coaxial with the axis 'of rotation of said cutter frame,a drive connection from said Shaft to said gear, means for selectively connecting said gear with said cutter frame, another gear rotated by and coaxial with saidfirst-mentioned gear, a selective operative connection I from said last-named gear tosaid cutter head and a selective drive connection from "said last na'medgear to said '9. In a mining machine of the class described, cutting mechanism therefor including a motor, a cutterframe disposed forwardly of said motor for'rotation about a'horizontalaxis, a cutter bar supported thereby forpivotal movement about an "axis disposed perpendicularly to the axis of piv'ota'l movement'of said cutter'frame, and common ;drive means for selectively rotating said cutter-frame 'oripi'voting'said cutter bar about its connection from saidgear to said cutter bar for pivoting said cutter bar and a selective connection from said gear'to said cutter frame for rotating said cutter frame upon rotation of said gearand *at the same-speed as the'speed of ro- 10. i In 'a mining machine of the class described, cutting mechanism therefor 'ir' cluding a motor, a cutter frame dis'pos'ed for wardlyof sai'dlmotor for rotation about a horizontal axis, a cutter bar supported thereby for pivotal movement about an axis disposed perpendicularly to the axis of pivotal movement ofsaidrcutter frame; and common drive means for selectively rotating i said cutterframe or pivotingsai'd' cutter bar abouttits axis of pivotal connection to said cutter frame comprising. a :shaft extending longitudinally? of said cutting mechanism and disposedeccentricallyof'th'e axis of rotation of said cutter frame, a gear-coaxial with'v-th'e'axis' of rotation of said cutter frame, a drive-connection 'from' said mo tor to: said shaftincluding plural'r speed gear re+ duction mechanism, a' drive connection from said shaft to said gear, another gear coaxial with'said' first-mentioned gear, a selective operative connection from' said' last-named gear to said cutter frame, a gear driven by said last-named gear and a-drive'conne'ction from' said driven gear to said cutter bar;

'11. Ina'miningmachine of the class described, cutting mechanism therefor including a motor, a cutt'erfr'ame disposed'forwardly of said motor for rotation about 'a horizontal axis, a cutter bar supported a'thereby for pivotal movement about an axis disposed perpendicularly to the axis of pivotal movement of said cutter frame, and common drive means for selectively rotating said cutter frame or pivoting said cutter bar about its axis of pivotal connection to 'said "cutter frame comprising a shaft extending longitudinally'of said cutting mechanism and disposed eccentrically ofthe-axis of rotationof said cutter frame, a gearcoaxial withthe axis' of rotation of said cutter frame, a drive connection from said motor to said shaft including reverse gearing and plural speed'gear reduction mechanism, a drive connection-from said shaft to-said gearaanothergear coaxial with saidfirst-mention'ed gear, a selective operative connection from-saidlast-named gear to said cutter frame; a gear driven by said last-named'gear and'a drive connection from said driven'gea'r tosaid cutterbar;

12.'In :a track mounted -mining machine, a truck; a pivotally movable frame thereon, cuttingmechanism' 'supported'onsaid pivotally movable'frameincluding-a motor, a cutter frame disposed forwardly of said'motorfor rotation about an =axis:-'disp'osed longitudinally of said cutter frame,:a cutter barzsupported by said cutter frame for pivotal movement about an 'axis disposed perpendicularly to said axis of pivotalmovement of'said cutter frame, means'driven by said motor for pivotally moving said pivotally movable frame and other means driven by said motor for independently rotating said cutter frame or pivotally moving said cutter bar comprising a com: mon drive member coaxial with the axis of pivotal movement of saidcutter frame, a selective connection-from said gear to said cutterframe including a clutch member and answerer-we connection from said gear to said cutter bar."

13. In a track mounted mining 'machine, a truck, a pivotally movable framether'eon, cutting mechanism supported on said pivotally movable frame including a motor, a cutter frame disposed forwardlyof said motor for rotation about an axis disposed longitudinallyof'said cutter frame,"a cutter bar'supported by said cutter frame for pivotal'movementabout an axis disposed perpendicularly to said-axis of pivotal movement of said cutter frame, a drive connection from said motor for pivotally moving said pivotally movable frame 'in' reverse directions 'without' reversal of'said 'motor' including reverse gearing, and another drive connection'fro'm saidmotor inde pendent of said first mentioneddrive connection for rotating said outter'frame or pivotally moving said cutter bar comprisinga common drive member and reverse gearing interposed between said-motor and drive member.

14. In a track mounted mining machine, a

'truck', a pivotally movable frame thereon, cutting mechanism supported on said pivotally movable frame including a motor, a cutter frame disposed forwardly of said motor for rotation about an axis disposed longitudinally of said cutter frame, a cutter bar supported by saidcutter frame for pivotal movement about an axisdisposedperpendicularly to said axis of pivotal movement 'of said cutter frame, a drive connection from said motor for pivotally moving said pivotally movable frame at a plurality of frictionally controlled speeds including a frictionally'controlled geared reduction device, and another drive connection from said motor independent of said first mentioneddrive connection for rotating said cutter frame or pivotally moving said cutter bar at a plurality of frictionally controlled speeds com-. prising a common drive memberand africtionally controlled plural speed geared reduction device interposed between said motor and drive mem ber.

15. In a track mounted miningv machine, a truck, a pivotally movable frame thereon, cutting mechanism supported on said pivotally movable frame including'a motor, a cutter frame. disposed forwardly of said motor for rotation about an for rotating said cutter frame or pivotally moving said cutter bar at a plurality of 'frictionally controlled speeds in reverse directions, without reversal of said motor comprising a common drive member, and reverse gearing and a frictionally controlled plural speed geared reduction device interposed between said motor and.

drive member.

16. In a mining machine, a support, a frame on said support swingable with respect thereto about averticalaxis disposed adjacent the rearward end of said support, a motor on said frame,

means driven by said motor for horizontally swinging said frame including a rack onthe forward end of said support and a pinion meshing therewith, cutting mechanism on said frame including a cutter frame rotatable about an axis extending longitudinally thereof, a cutter bar swingable about an axis perpendicular to the axis of rotation of said cutter frame, a cutter chain movable about said cutter bar, means for drivingsaid cutter chain about said cutter ban including a shaft rotatable about an axis parallel to the axis of rotation of said motor and coaxial with the axis of rotation of said cutter frame and means driven by said motor for rotating said cutter frame, including a shaft eccentric of the axis of rotation of said cutter frame and having a geared drive connection with drive cutter head) "17. In amining-machine, a ,.support,'-a frame" on .said support swingable-jwithi respect thereto about a vertical axis'disposed adjacent: the rearl ward end of said:support,"a motor on, said: frame,

means coaxial with the' axis :zof, rotation i'oflsaid means' driven by said motor for horizontally s'winging-saidfran're. including'a racksonrtnerors, 1

'wardend ofsaid' supportand apinion meshing .therewith, cuttingmechanism on said frame including-a cutter framerotatableaboutanaxis 7 extending longitudinally thereof, ,a cutter bar swingable about an axis perpendicular to the axis of rotationof said cutter" frame, a cutter chain movable'about said cutter bar, means for driving said cutter chain about" said cutter bar including a shaft rotatable about an axis parale lel to the axis of rotation of said motor and coaxial with the axis of rotation of said cutter w, I 7 frame, and means driven by said motor for rotating said cutter frame and independently swinging said cutter-bar including a shaft parallel to and eccentric-of the axis of rotation of said.

cutter frame and having a geared drive connection with drive means coaxial with the axis of rotation of said cutter frame.

18. In a mining machma'asupport, cutting mechanism on said support including a motor, 1

a cutter frame rotatable-about a longitudinal axis, a cutter bar. carried by said cutter frame, for

pivotal movement about an axis perpendicular to theaxis of pivotal'movementof said cutter v I frame, said cutter bar having a cutter chain movable thereabout, means driven by said motor for driving said cutter chain'about said cutter bar including a shaft rotatable about an axis parallel to the axis of rotation of said motor and coaxial with theaxis of rotation of said cutter head, and means driven by said motor for rotating said cutter frame including a shaft parallel;

to but eccentric of-the axis of rotation of said cutter frame, a gear coaxial with thejaxisyof rotation of said cutter frame driven by said shaft and a selective connection between said gear and cutter frame.

' 19.,In a mining machine, a support, cutting mechanism on said support including a motor, a cutter frame rotatable about alongitudinal' axis, a cutter bar carried by said cutter frame for pivotal'movement about an axis perpendicular to the axis of pivotal movement of said'cutter frame, said cutterbar having a cutter chain movable thereabout, means driven by saidfmotor for driving said-cutter chain about said cutterbar including a shaft rotatable about an axis paralid to the axis of rotation of said motor'and ooaxial with, the axis of rotation of said cutter head, and means driven by said motor for 'ro-' tating said cutter frame and: independently swinging said cutter bar about anaxis perpendicular touthe axis of rotation of saidc'utter head including a shaft parallel to buteccentric selective connection from said gear to said outter frame, and a drive connection from said gear to said cutter bar for swinging said cutter bar.j

20. In a mining machine, a support, cutting mechanism on said support including amotor,

a cutter frame rotatable about a longitudinal axis, a cutter bar carried by said cutter. frame for pivotal movement about an axis perpendicu lar to the axis of pivotal movement of said cutter of the axis of rotation of said cutter framega frame,j: said, cutter bar having a cutter chain -movable thereabout, means driven by said motor for driving said cutter chain about said cutter a? 'shafit; rotatable about' an 'axis parallel to the axis of rotation of saidimotoriandi coaxial .:with: thevaxisn-or rotation .of said "cutter head; and-,meansrdriven'by said1 motorzforrotattoifthe axisr'of rotation of 'saidccutter. head includingia; shaftv parallel tobuteccentric r of the axis of rotation of said cutter frame, agear coaxial with the axis of rotation of said cutter:

frame anddriven by said eccentric shaft,*a selective connection from said gear to said cutter frame; a coaxial gear driven from said first mentioned gear and a drive connection from' said gear to 'said cutter bar.

' CHARLES A. PRATT. 

